Bung-bushing.



No. 871,444. PATENTED NOV. 19, 1907. G. H. RIOKE.

BUNG BUSHING.

APPLICATION FILED FEB. 20, 1906.

UNITED STATES PATENT OFFIGE.

GEORGE I-I. RIOKE, OF CINCINNATI, OHIO, ASSIGNOR, BY DIRECT AND MESNEASSIGNMENTS, TO THE MILLER BU-NG BUSH COMPANY, OF CINCINNATI, OHIO, ACORPORATION OF OHIO.

Specification of Letters Patent.

Patented Nov.,19, 1907.

Ap lication filed February 20.1906. Serial a. 302.105.

T all whom it may concern:

Be it known that I, GEORGE H. RIOKE, a citizen of the United States,residing at the city of Cincinnati, in the county of Hamilton and Stateof Ohio, have invented certain new and useful Im rovernents inBung-Bushings, of which the ollowing is a specification.

The object of my invention is to produce a cheap, simple and efficientbushing for bung or tap holes in beer kegs and barrels.

Beer kegs and barrels belon to that class of cooperage, known as tig tpackages and are made up of thick, heavy staves and thick expensiveheads, held together by heavy steel hoops. At its bilge the keg isrovided with a bung hole. This hole is tted with and rotected by an ironband or ferrule called a ush or bung bushin The stave into whichthis-bushing is placed. is

called the bung stave. It is usually a se lected stave, being the bestin the ackage,

inasmuch as this stave is weakene by the Y bung hole. These bung stavesoften crack around the bushing allowing gases to escape from the'keg,entailing loss and inconvenience, as the mntents are spoiled and thekegmust be repaired. This cracking is more common in kegs on which the hoos have I together; this strain is transmitted to the been re-pulled, asthe hoops, being pu led farther down on the eri hery of the keg to takeup shrinkage, pu ls tie staves more tightly wood around the bung bushingand as the Wood around the threads has no lace to go, it lifts on rises,thus weakening t 's oint 1n the stave; but in my bush the threa s beingfar apart and forming pockets, the Wood between the threads is wider andthe threads are wider and the "threadsdo not ofier'the same amount ofresistance as they do in the case of the ordinary bung bushing, thus thewood can force into the pockets and be accommodated, and thus will notlift or rise, keeping the stave in the normal position.

My invention consists essentially in providing several series of artialscrew threads around the periphery o the bung bush, one series ofpartial screw threads overlapping or passing the ends of the otherseries, so that where they overlap, the thread is unbroken and closejust as the thread in the ordinary screw bung bushing but at the pointswhere they do not overlap, the space between the is formed between them.

one third of the periphery 'of the bush.

. ig. 3 is a sectional view of the bush taken at line 11 of Fig. 2, partof the stave being shown in section. the bush.

I provide series of partial screw threads around the periphery of thebush, each series being independent, the partial screw threads of oneseries overlapping the partial screw threads of the adjacent series attheir ends, so that where they overlap the screw threads are closetogether just as in the ordinary screw bush, but throughout the rest oftheir length, the threads are far a art and a pocket n the resentinstance, I show three series of s ort screw threads, thus therearethree sets of-overlappin parts and three sets of Wide parts or poccets.

The bush is formed of ring ferrule or band a, carrying at its top aflange a. The bush Fig. 4 is a bottom View of is widest at the top andtapers towards the bottom.

One series of artial screw" threads is marked 1) and itsa j acent seriesb '6 These partial screw threads each run around about The oints wherethe partial screw threads overap each other are designated by the letter0, and the points where the screwthreads are far apart and form pocketsare marked'rl.

The threads have the ordinary shaped cutting edge and on each side ofsaid cutting edge, some distance back from the cutting point areprovided with continuous shoulders or auxiliary cutters d; thesecuttersd assist.

drawing forming.

in forcing the wood up against the adjacent screw threads and into thepockets d. Thescrew threads are preferably on an incline as isordinarily the casein screw threads on bun bushings.

T e space between the partial threads where they overlap is not deep,but is formed about like the screw threads now used, so

that the threads will sink into the Wood all the way and at these pointsmake an absolutely tight joint, so that leakage of any kind isprevented; the wood is also ti ht up against the base of the threadsaround the pockets, the pockets being present for the purpose ofreceiving the wood which is forced asunder when the threads are diggingtheir way into the wood.

The bush is screwed into the bung hole in the bung stave d the lowestthreads of one series first cutting the way into the wood and movingdownward, the next highest thread of the adjacent series follows in itspath and thus one follows in the path of the one before it and below it,the bush always of course, going further down in the bung hole, until ithas been screwed home and the flange o fits-tightly against the bungstave; in this operation the screw threads no not chew, break or sliverthe wood, as the shoulders or auxiliary cutters force the wood into thepockets d in the wide part between the threads, where it is preserved ina natural and unbroken condition. The tight fit and cut of the threadsat the joint where the threads overlap is also relieved by the woodbeing squeezed. back toward the pockets (l, and inasmuch this space isnot long and continuous, but short, the wood is not broken and torn.

It will be readily apparent that my bush can be screivedinto the woodwithout serious damage and that the wood is left in such a conditionthat the heat from the pitching machine spray tube and the incanevincedescent rod for removin the surplus pitch will not disturb it or wea zenit; and further that the repulling of the hoops will not.

affect it inasmuch as the wood can find a home and will not be groundand lifted, thus the bung stave will he saved and great expense incooperage saved and the weakest part of the keg or barrel be madeasinv'ulnerable, as the rest of the package.

Of course I may use as many sets or series of screw threads as I desire,two, three four or more. I may form the threads as far closely together,and the space between the.

threads where they do not overlap recessed to form pockets for the wood,as set forth. Signed at Cincinnati, Hamilton county,

.Ohio, this 12th day of February A. D. 1906.

1 GEORGE H. RICKE.

'Witnesses Y "Karin STREHLI,

Cnnrsrrnn SOHAUL.

